Purification of beta-glucosidase from Saccharomyces lactis strains Y-14 and Y-1057A.
Two strains of Saccharomyces lactis (Y-14 and Y-1057A), medium (B(m)) and low (B(1)) constitutive producers of beta-glucosidase, were grown in enriched medium. beta-Glucosidase was extracted by autolysis and purified by ammonium sulfate precipitation, gel filtration, and calcium phosphate gel adsorption-elution. The kinetics of release, purification, and stability of beta-glucosidase from strains Y-14 and Y-1057A were compared with the enzyme from strain Y-123. The ability of glycerol, sorbitol, and mannitol to stabilize the beta-glucosidases is presented. A lower molecular weight, labile form of the Y-14 enzyme is demonstrated. Differences in the initial specific activites of beta-glucosidase among the three strains are discussed.
D011232:Chemical Precipitation; D002850:Chromatography, Gel; D005959:Glucosidases / Q000302:isolation & purification* / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D008970:Molecular Weight; D012440:Saccharomyces / Q000201:enzymology* / Q000254:growth & development
D005959:Glucosidases